34. 
D.Sc., M.A., Jesus College. Several species of butterflies 
belong to the wonderful black-hind-winged group, which is 
characteristic of this part of South America, and have been 
added to the bionomic series. 
Five small but valuable Coleopterous groups exhibiting 
mimicry, or more probably common warning colours, from the 
French Congo (1892), Loanda (1893), Sierra Leone (1898), 
Sumatra and S.E. Brazil, respectively, were presented by the 
Zoological Museum at Tring, together with a similar asso- 
ciation between Lycid beetles and their mimics from N.W. 
Ecuador (1897): in all 18 specimens. The same museum 
also presented three specimens of Acraea excelsior from the 
Kikuyu Escarpment, B. E. Africa (1900-1901), and a very 
valuable series of butterflies from Abyssinia. The latter await 
the publication of additional geographical data, and are there- 
fore at present uncatalogued. 
A specimen of the transparent-winged Sphingid moth, 
Hemaris hylas, bred Jan. 2, 1897, at Brisbane, was presented 
by O. E. Janson, Esq., F.E.S. The specimen is of great 
interest inasmuch as it still retains the scales with which the 
transparent parts of the wings are covered when the insect 
emerges from the pupa.- The species is probably more com- 
pletely transparent than any other Sphinx. In 1890 the Pro- 
fessor examined the transparent portions of the wing-membrane 
of this species with the microscope, and found the minute rudi- 
mentary sockets which indicated the former presence of scales. 
He then inferred that in this, the most extreme product of 
specialization in the direction of transparency, the scales, 
having being got rid of for a longer period than in other 
species, would probably be found to have sunk to a lower 
level of degeneration. Owing to Mr. Janson’s gift it is now 
for the first time possible to test this prediction. 
A hundred and six Lepidoptera from various localities 
were presented by W. J. Kaye, Esq., F.E.S. They include 
27 Pierine butterflies and 2 moths from Malindi, B. E. Africa 
(about 1890); 37 Lepidoptera from British Guiana, among 
them several valuable and greatly needed accessions to the 
